Hi,
I have recently started to use Xenomai on Raspberry Pi. My experience with
Linux Kernel building etc. is zero so I downloaded the pre-built image
from powet.eu. I have successfully created a cross compile environment to
create user-space applications using the Posix skin. While tracking down
some mode changes I came across the limitation of Posix skin Timers in
that the timer expiry creates a signal which causes a mode switch.
I have considered creating an application layer timer module using a pool
of threads that use nanosleep and a callback function on expiry. Careful
management of these threads using a custom timer API could fulfill my
requirements.
While exploring the documentation for alternatives, I noticed that the
RTDM Driver Development API provides access to native timers that would
seem to perform the functionality that I need, On trying to use them in a
user-space application, however, it seems that they may only be used in
kernel-space. This leads me to the following question:
Is the documentation incorrect for rtdm_timer_init() when it says
it may be used in user-space tasks?
Dave Joynson
Alstom Grid | Research & Technology | Senior Research Technologist
Phone: +44 (0)1785 223 251 ext. 6577 | E-mail: [email protected]
Office address: St Leonard Avenue - Stafford ST17 4LX - England
Site: www.alstom.com
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